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China ESFV Rotary Star Feed Ceramic Valve - Precision Flow Control from Trusted Suppliers and Factory
Performance Characteristics
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Fully Ceramic-Lined All internal surfaces in contact with the material are lined with alumina ceramic, providing excellent wear and corrosion resistance while preventing metal contamination. Critical components include the rotor and valve body lining.
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Clean and Non-Polluting Suitable for applications requiring contamination-free handling of powders or fine particles.
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Precise Adjustment & Backflow Prevention Rotor design ensures smooth and controlled feeding, effectively preventing backflow.
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Versatile Feeding Solution Ideal for use as a metered feeding device in air-flow mills, mechanical crushers, ball mills, vibration mills, stirred mills, and other powder-handling equipment. Can also function as a discharge device at the outlet.
Main Technical Parameters
| Item | Y-ZrO Y-TZP | Mg-ZrO₂ M-PSZ | 90 Al₂O₃ | 95 Al₂O₃ | 99 Al₂O₃ | Si₃N₄ | SiC | Common ceramics | Carbide alloy | 45# Steel |
| Density g/cm³ | 6.0~6.05 | 5.72~5.74 | 3.45~3.55 | 3.6~3.75 | 3.9~3.95 | 3.2~3.33 | 3.15~3.25 | 3.0~3.5 | 14~18 | 7.8 |
| Hardness HRA/C | 87 | 85 | 90 | 90 | 92 | 92 | 94 | 50~60 | 70 | 36 |
| Flexural Strength MPa | 1150 | 900 | 350 | 370 | 450 | 1200 | 470 | 20~50 | 2000 | 804 |
| Fracture Toughness (KIC) MPa√m | 10~12 | 13~15 | 3.4 | 3.6 | 4.5 | 7 | 4 | -- | 20 | 101 |
| Compressive Strength MPa | 2000 | 1800 | 1700 | 2000 | 2200 | 2800 | -- | -- | 4000 | 2000 |
| Thermal Shock Resistance °C | 87 | 110 | -- | -- | 50 | 200 | 75 | -- | 500 | 500 |
| Thermal Expansion Coefficient ×10⁻⁶/°C | 9.6 | 10 | 7.6 | 7.8 | 8.3 | 3.4 | 4 | -- | 7 | 12 |
| Modulus of Elasticity GPa | 200 | 200 | 310 | 330 | 350 | 300 | 400 | -- | 600 | -- |
| Crushing Load KN (Φ6mm) | 15 | 10 | 3.5 | 3.6 | 4 | 18 | 3.5 | -- | -- | -- |
| Using Temperature °C | <160 | <1000 | <1200 | <1250 | <1500 | <1500 | <1500 | -- | -- | <560 |
| Water Absorption | 0 | 0 | 0.02% | 0.01% | 0.00% | 0 | 0.50% | 5~10% | -- | -- |
| Corrosion Prevention | Good | Good | Good | Good | Good | Good | Good | Flooey | Good | Flooey |
* Data sources: test results or issued original documents.
Anti-Corrosive Performance Reference Table
| Media | Temperature | ZrO₂ | 99.9% Al₂O₃ | SiC | Si₃N₄ | Graphite | PTFE | Fluororubber | SS304 | SS316 | HC |
| 20% HCL | 60°C | A | A | A | B | A | A | A | C | C | B |
| 20% HCL | 95°C | A | A | A | C | A | A | A | -- | -- | C |
| 90% H₂SO₄ | 60°C | A | A | A | A | A | A | A | C | C | B |
| 90% H₂SO₄ | 95°C | A | A | A | B | A | A | A | C | C | C |
| 60% H₃PO₄ | 60°C | A | A | A | C | A | A | A | C | C | A |
| 60% H₃PO₄ | 95°C | A | A | A | C | A | A | A | C | C | A |
| 10% HF | 60°C | C | B | A | A | A | A | A | C | C | B |
| 46% HF | 95°C | C | C | A | C | A | A | A | -- | -- | C |
| 60% HNO₃ | 60°C | A | A | A | C | B | A | A | A | A | C |
| 60% HNO₃ | 95°C | A | B | A | C | B | A | A | B | B | C |
| 30% NaOH | 60°C | A | B | A | B | A | A | A | A | A | A |
| 30% NaOH | 95°C | B | B | A | C | A | A | A | A | B | A |
A ≤ 0.1 mmg/cm²/day — Can be ignored or has no corrosion, recommended for use.
B = 0.1~0.3 mmg/cm²/day — Slight or very minor corrosion, use with caution.
C ≥ 0.3 mmg/cm²/day — Significant corrosion, not recommended for use.
-- : Intense corrosion, to the extent that measurement is not possible.
Flow Characteristic Sheet of Ceramic Ball Valve
| Core Specifications | O-type ball core | V60° ball core | V45° ball core | V30° ball core |
| DN15 | 10 | 7 | 4 | 3 |
| DN20 | 18.2 | 12 | 8 | 5 |
| DN25 | 29 | 18 | 12 | 8 |
| DN32 | 47 | 30 | 20 | 13 |
| DN40 | 73 | 46 | 31 | 21 |
| DN50 | 114 | 72 | 48 | 32 |
| DN65 | 181 | 115 | 76 | 51 |
| DN80 | 292 | 185 | 123 | 82 |
| DN100 | 456 | 289 | 192 | 128 |
| DN125 | 712 | 452 | 300 | 201 |
| DN150 | 1025 | 650 | 432 | 289 |
| DN200 | 1822 | 1156 | 769 | 514 |
Typical Applications
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Battery powder discharge valves
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Chemical powders and fine particle handling in high-tech material processing
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Feeding devices for various powder processing mills and equipment
Frequently Asked Questions
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What materials are used for the internal lining of the ceramic valve?All internal surfaces in contact with the material are lined with alumina ceramic. Critical components such as the rotor and valve body are fully ceramic-lined to ensure excellent wear resistance, corrosion resistance, and zero metal contamination.
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Which ceramic material offers the highest hardness and compressive strength?SiC (Silicon Carbide) offers the highest hardness at HRA 94, while Si₃N₄ (Silicon Nitride) provides the highest compressive strength at 2800 MPa among the ceramic materials listed. Carbide alloy leads overall with 4000 MPa compressive strength.
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Is the ceramic valve suitable for highly corrosive chemical environments?Yes. ZrO₂ and 99.9% Al₂O₃ ceramics demonstrate excellent corrosion resistance (Grade A) against most acids including HCL, H₂SO₄, H₃PO₄, and HNO₃, as well as alkalis like NaOH. However, ZrO₂ and Al₂O₃ are not recommended for use with HF (hydrofluoric acid).
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What types of powder processing equipment is this valve compatible with?The ceramic-lined valve is compatible with a wide range of powder-handling equipment including air-flow mills, mechanical crushers, ball mills, vibration mills, and stirred mills. It can serve as both a metered feeding device and a discharge device at the equipment outlet.
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How does the V-type ball core differ from the O-type ball core in terms of flow capacity?The O-type ball core provides the highest flow capacity across all pipe sizes. For example, at DN100, the O-type delivers a flow of 456, while the V60°, V45°, and V30° cores provide 289, 192, and 128 respectively. The V-type cores are designed for more precise flow control and regulation.
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What are the main application industries for this ceramic-lined valve?The ceramic-lined valve is widely used in battery manufacturing (powder discharge), high-tech material processing involving chemical powders and fine particles, and as feeding or discharge devices in various industrial powder processing mills and equipment.